你完全是蹲着的，直到你的大腿与地板达到平行的角度，然后尽可能地往高跳，重复这个动作（视频）。
Basically you squat down until your thighs are parallel to the floor, then jump up as high as you can, and repeat. (Video.)
那桥确实有些高，刚开始，谁也不敢跳，大家胆颤心惊地翻过桥栏杆，做出要跳的模样，比划了半天，不敢撒手，一撒手，人就会掉下去。
The bridge was really quite high and at first no one dared to attempt it. All of us got up on the bridge railing and pretended to jump. But after many pretend gestures, we dared not do it.
那桥确实有些高，刚开始，谁也不敢跳，大家胆颤心惊地翻过桥栏杆，做出要跳的模样，比划了半天，不敢撒手，一撒手，人就会掉下去。
The bridge was really quite high and at first no one dared to attempt it. All of us got up on the bridge railing and pretended to jump. But after many pretend gestures, we dared not do it.
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